First heard in the 427 Small Block, Ashdowns Dual Tube bass preamp was an instant hit, thanks to its solid, articulate bottom end and sparkling highs. With its stunning polished chrome panel, the 550W Ashdown Dual Tube Series 550 head takes this stunning tube preamp design and partners it with the tour proven ABM 500 power stage.
The discerning bass player gets high and low gain inputs, front panel-mounted FX send and return, rotary bass, middle and treble controls with mid shift, bass shift and bright switching, mute switch, rotary gain and master volume controls and a DI output.
Power Output (RMS) 525W(550)
Power Requirement 230 / 115 / 100V
Frequency Response -3dB at 20Hz and 20kHz
Speaker Outputs Speakon/Jack
High Instrument Input Impedance 1m Ohms, input range 25mV - 1.5V p-p
Low Instrument Input Impedance 100k Ohms, input range 25mV - 6V p-p
Line Input Impedance100k Ohms, input level 0dBu nominal
DI Output 600 Ohms balanced, level 0dBu nominal
Impedance Minimum 4Ohms
EQ Fully Passive Middle Treble Bass Bass Shift Middle Shift Bright Switch
Effects Send 1k Ohms, level 0dBu nominal
Effects Return 1m Ohms, input level 0dBu Nominal
Pre-Amp Tubes 1 x ECC82 1 x ECC83
H x W x D (mm) 150 x 500 x 320
Weight (kg) 14